Cutts, Martin
The plain english guide : guide to write clearly and communicate better
Oxford University Press, 1995
 Buku Teks
Shurter, Robert L.
Handy grammar reference: a guide to better English / Robert L. Shurter
McGraw-Hill, 1959
 Buku Teks
Burt, Angela
A Guide to better spelling
Stanley Thornes, 1995
 Buku Referensi
Lewis, Norman
Thirty days to better English/ Norman Lewis,
Doubleday, 1965
 Buku Teks
Hammond, John S., 1937-
Smart choices : a practical guide to making better decisions
Harvard Business School, 1999
 Buku Teks